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Finding the Fourth Proportional to 71,214.99, 98,211.65 and 61,140.21

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Solution

The fourth proportional to 71,214.99, 98,211.65 and 61,140.21 is: 84,317.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,214.99 : 98,211.65 = 61,140.21 : x
  2. Step 2: Convert to fraction form
    71,214.99/98,211.65 = 61,140.21/x
  3. Step 3: Cross multiply
    71,214.99x = 98,211.65 × 61,140.21
  4. Step 4: Simplify right side
    71,214.99x = 6,004,680,905.45
  5. Step 5: Solve for x
    x = 6,004,680,905.45/71,214.99
  6. Step 6: Final answer
    x = 84,317.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.